Hardware Description
ComTec GmbH
3-2
result in higher case temperature. In the software a temperature monitor feature is provided that
shows the internal FPGA and PCB temperatures.
WARNING:
The metal case can get very warm or even hot. Beware of burning yourself.
IMPORTANT NOTE:
Provide ample airflow around the device for proper cooling. Do not cover the case. Do not place it
inside closed cabinets etc.
3.2. General
Functionality
3.2.1. ‘GO’-Line
The ‘GO’ line is a system-wide open-drain wired-AND signal that can start and stop a
measurement. This line is available on the FEATURE connector and on the specific BNC
connector on the rear panel.
The ‘GO’ line may be enabled, disabled, set and reset by the software. The system-wide open-
drain ‘GO’ line enables any connected device to enable and to stop all participating measurement
equipment simultaneously. This allows for easy synchronization of electronic devices previously
often not possible.
When watching of the ‘GO’ line is enabled for the MPA4, a low line voltage will halt the
measurement. When output to the ‘GO’ line is enabled, starting a measurement (i.e. the MPA4 is
armed) will release the ‘GO’ line (high impedance output) whereas a halt of the measurement will
pull-down the ‘GO’ line to a low state. Since it is an open-drain output wired-AND connection with
other devices is possible. Also refer Fig. 3.3.
The ‘GO’ line is available on most of the other FAST ComTec products as well.
Fig. 3.2: Thermal picture of the metal case